Aligning machine for connecting rods and whist pins of internal-combus



1,622,560 W. AAB ALIGNING MACHINE FOR CONNECTING RODS AND WRIST PINS March 29 1927.

OF INTERNAL COMBUSTION ENGINES Filed 001'. 5 1925 Nil/i017] A017 :3 134 M Patented Mar. 29, 1927.

UNITED; STATES PATENT OFFICE.

WILLIAM .AAB, OF NEW ULM, MINNESOTA.

AIIG-NING MACHINE FOB CONNECTING RODS AND WRIST PINS OF INTERNAL-COMBUS- TION ENGINES.

Application filed October 5, 1925.

My present invention has for its object to provide a simple and highly efficient machine for aligning the connecting rods and wrist pins of internal combustion engines, and to this end it consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

, In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings:

Fig. 1 is a plan view of this machine; and

Fig. 2 is an elevation of the same with some parts shown in different positions by means of broken lines.

The numeral 8 indicates a flat base having at its back a depending longitudinally extended flange 9 suitably reinforced by means of cross ribs 10. The top of the base 8 is planed true to afford a piston testing surface 11.

The base 8 may be rigidly held in any suitable manner such as by having its depending flange 9 clamped between the aws A of a bench vice, one of which is fragmentarily shown in Fig. 2. Formed with the base 8, at the lefthand end thereof, is a fixed split bearing sleeve 12 having a turning-rod-equipped adjusting screw 13 for contracting the same. The axis of this bearing sleeve 12 extends parallel to the work-supporting surface 11 and transversely thereof.

A head 141 is slidably mounted on the worksupporting surface 11 and has front and rear depending flanges 15 that have beveled interlocking engagement 16 with v the front and rear longitudinal vertical edges of the base 8 and guides said head for straight line movement toward and from the bearing sleeve 12. To secure the head 14 to the base 8 in different adjustments in respect to the bearing sleeve 12, said head is longitudinally slit, not shown, on its under side at the back thereof and is provided with a hand screw 18 for contracting said head and thereby clamp its flanges 15 onto the longitudinal vertical edges of the base 8. Integrally formed with the head 14 are laterally and horizontally spaced split bearings sleeves 19 and 20 provided with turning-rod equipped adjusting screw 21 and 22, respectively, for contracting said bearing sleeves. The axes of the bearing sleeves 19 and 20 Serial No. 60,474.

are parallel to the axis of the bearin sleeve 12 and to the work-supporting surface 11.

F or holding the connecting rod 13 of an internal combustion engine while testing its wrist pin C, an arbor 29 is turnably mounted in the bearing sleeve 12 and has a forwardly projecting section 30 on which the crank end of said connecting rod and its bushing are mounted. The arbor section 30 is of a diameter that corresponds to the crank of an engine crank shaftfor which the connecting rod B is designed. Preferably, as shown, the arbor section 30 is flattened on four sides leaving four rounded corners that are engaged by the bushing of the connecting rod B and hence will tightly hold bushings that vary slightly in diameter. In actual commercial usage, a plurality of arbors like 29, but having sections like 30 of different diameters to correspond to the cranks of different engine crank shafts, will be provided for interchangeable use.

For testing the wrist pin C to determine whether or not its axis and the axis of the arbor 29 are in parallel planes and to also determine whether or not said axes are in a common plane, I provide two axially spaced discs 31 integrally formed with the ends of a relatively small shaft 32. The inner disc 81 is integrally formed with the outer end of a shaft 33 removably mounted in the bearing sleeve 20. The peripheries of the discs 31 are concentric with the axis of the shaft 33 and afford testing surfaces for the wrist pins C. By axially adjusting the arbor 29 or the shaft 38 or both, the connecting rod B and the discs 31 may be posi tioned in respect to each other so that said rod projects transversely of the shaft 32 midway between said discs.

To test the connecting rod 13 to determine whether or not the axis of its wrist pin C and the axis of the arbor 29, which corresponds to the engine crank shaft to which said connecting rod is to be applied, are in parallel planes, said connecting rod is held with the axis of its wrist pin C in the same horizontal plane with the axis of the discs 31 and the head 14 is moved toward the arbor 29 until stopped by the engaging of the peripheries of the discs 31 at points in a. vertical plane with portions of the wrist pin C, as shown in Figs. 1 and 2. If the wrist pin C is in a true position for this test, its end portions will be in engagement with both discs 31, but if not, it will be necessar to bend the connection rod B to properly set said pin. To test the wrist pin C to determine whether or not its axis is in; a common plane with the axis of the arbor 29, the connecting rod B'is raised above the dis'e's 31 to permit the head 1 to be moved toward the arbor 29 to position said disc under the wrist pin C. The connectingr'o'd B is then lo'i'vered to bring the end portion ofthe wrist pin C onto the peripheries of the disc with the axis of said discs in the same horizontal plane with the axis of said pin. If both end portions of the wrist' pin Ceng'ag'e the peripheries of both discs 31, as shown by broken lines in Fig. 2, said wrist pin in a true position for this test, but if nt;,said con5 necting rod B must be twisted until both end portions of the wrist pin C rest on the peripheries of the discs 81. It may be here stated, that the wrist pin- C may be an old pin or a testpin to be replaced by a new wrist pin after the connecting rod 13 is trued up. l I I The bearing sleeve 19 is provided for interchangeably holding 'a centering device for the wrist pin bushing of a connecting rod and the bushing for areai'ner which is made the subject-matter of a co-penjding application No. 104,062, filed April 23, 1926.

What I claim is: I

1. A machine of the kind de's'crib'ed ha-ving a base with a Work surface, a sliding head on the base two bearings one of which is'oii the base-and theother of which is on the head, the axes of said bearings being parallel to each other and the work surface and extend atright angles to the direction of travel of the head, an arbor for the crank hnbef a? eennectingi od' mounted in the bearin'g'o'ii" the base, and a shaft mounted in the bearing on the head and having a pair of axially spaced disc's; the peripheries of which are concentric to the axis of the shaft and afford testing surfaces for the wrist pin of said connecting rod. p

2i Ajmachine of the kind described haviii'g base with a work surface, a sliding head on the base, two split bearing sleeves having means for contracting the same, one of said sleeves being on the base and the other on jt hehea'd theaxes "of'sa-id' sleeves being parallel to each other and the Work surface and extending at right angles to the direction of travel of the head, an arbor for the crank hub of c'onnectingrrodremovahly mounted in the bearing sleeves on the base for 'axiala'nd rotary adjustments, a shaft removably mounted in the hearing sleeve on thehead for axial and rotaryadjustments, said shaft having a pair of axially spaced discs, the peripheries of which are concentric to the axis of the shaft and afford testingsurfaces for the Wrist pin of said connecting rod.

In testimony whereof I afhx my signature;

VVILLIAM AAB. 

